Adjustment motion transmitting and retaining device



March 1954 o. H. BANKER 2,670,824

ADJUSTMENT MOTION TRANSMITTING AND RETAINING DEVICE Filed March 29, 195060 65 Z dig/car f/jarz/iaz WWKW Patented Mar. 2, 1954 UNITED STATESADJUSTMENT MOTION TRANSMITTING AND RETAINING DEVICE Oscar H. Banker,Evanston, Ill., assignor to New Products Corporation, Chicago, 111., acorporation of Delaware Application March 29, 1950, Serial No. 152,696

2 Claims.

This invention relates to adjustment motion transmitting and retainingdevices particularly of the character utilizable between a manuallyoperated control member and a part to be manually adjusted by forceapplied to the control member, and the device being operable to precludemovement of said part excepting by force transmitted from the controlmember.

An important object of this invention is the provision of a device ofthe aforesaid character employing a cup-like casing adapted to receive alubricating substance together with con centric driving and drivenstructures inserted through the open end of such casing, the drivenstructure being the inner one of the concentric structures and beingreleasably lockable to the interior of the casing by releasable brakemeans adapted to be released by means rockable with the outer of suchstructures to facilitate rocking of the inner structure by forcereceived from the outer structure.

A further object is the provision in a device according to the precedingobject of sealing means between the outer structure and the casing andbetween the driving and driven structures to prevent egress of thelubricating substance outwardly through the cup-like casing opening.

A still further object is the provision of an ad-' justment motiontransmitting and retaining device consisting of a relatively smallnumber of sturdy economically produced and readily assemblable parts.

Another object is the provision of a device according to any of thepreceding objects wherein the cup-like casing is mountable in selectiverotative positions upon a mounting bracket or the like.

Another object is the provision of a device of the aforesaid characterhaving driving and driven parts independently and relatively rotativelyadjustable in the cup-like casing to attain desired angular relation ofsuch members and to carry brake rollers into an unused circular brakingsurface cooperable therewith in the casing. V

These and other desirable objects inherent in and encompassed by theinvention will be more readily comprehended from the ensuingdescription, the appended claims and the annexed drawings, wherein:

Fig. 1 is a side view of the device showing the lower half in elevationand the upper half in section and with other parts partly in section forclarity.

Fig. 2 is a transverse sectional view taken on the line 2-2 of Fig. 1.

Fig. 3 is an end view of the driving structure in the device of Fig. 1,looking at the left end thereof as this structure is oriented in Fig. 1.

Fig. 4 is a fragmentary side elevational View of the left end of thedriven structure'of the device as it appears in Fig. 1.

Referring now to the drawings and particularly to Figs. 1 and 2, acasing ll of the device has a cylindrical outer periphery divided into alarge diameter section l2 separated by a smaller diameter section l3 bya shoulder M. The smaller diameter portion [3 is slidable through anopening H5 in a mounting bracket l6 after which a retaining nut I! isturned onto a threaded section [8 of the small diameter portion forpulling the shoulder l4" tightly against one face of the bracket whilethe nut presses a washer l9 firmly against the opposite side of thebracket.

A chamber 2| within the casing is bounded" by a'cylindrical innerperiphery 22 of the casing.

This chamber is closed at one end by an end wall' 23 of the casing andis open at the opposite en 24 of the casing.

A driving structure 25 of generally tubular formation is disposedcoaxially in the chamber 2| for oscillative movement therein. Thisdriving structure has a circumferential radially out- Wardly projectingflange 26 on its inner end and a radially outwardly projecting flange 21ad jacently to its opposite. end Flange 21 is circumscribed by anannular groove 28 for receiving sealing means in the form of an O-ring29 which reacts between the circular bottomlof'the groove 29 and anopposed cylindrical peripheral a portion of the cylindrical chamber 2|in the cas-v ing. A snap ring 3! is seatable within a groove '32extending about the cylindrical wall of the operated control lever 35. Apair of semi-cir-- cular flanges 3B and 3.? project axially from theflange 26' at the inner end of the structure 25, these flanges 3B and 3!constituting brake releasing means for releasing brake means whichincludes cylindrical rollers 38, 39, 40 and 4|.

Prior to assembly of the snap ring 3| with the casing and'prior totelescopic insertion of the,

was inserted telescopically into the bore 43 ofthe driving. structure 25to place a cam head 44 sembled within a diametric bore in the cam head44 prior to insertion of the sub-assembly parts through the chamber openend 24. A small O-ring 52 of synthetic rubber is disposed within acircumscribing groove 53 of the driven structure 42 to effect an oilseal between the parts 42 and 25. After the parts are assembled as illustrated in Fig. 1 the detent balls 47 and 48 register with diametricallyopposite holes 54 and S5 in the flanges 36 and 31 which provide annularseats 56 and 51 for these detent balls.

Cam head 44 has a pair of substantially planar profiles 58 and 59 whichconverge in opposite directions onto the cylindrical inner periphery ofthe chamber engaged by the brake rollers 38 and 39 whereby the spring 45in urging these rollers 62 and 63 have arcuate cut-away sections 64 and65 shown in Fig. 4 to accommodate the springs 45 and 46,.

Dispersal of a fiowable lubricant substance Within the chamber isfacilitated by radial bores 66 in the rockable driving structure 25,radial bores 61 in the rockable driven structure 42 which respectivelyregister with the bores 56, and an axial recess 68 communicating betweenthe radially inner end of the bores 6'! and the inner end of therockable structure 42. An outer end portion of the driven rockablestructure contains an axial slot 89 to accommodate a key l9 whichconstrains a driven arm H for rotation with such rockable structure.

Operation of the device The device is illustrated in the drawings withthe driven structure and the force transmitting arm il upon its outerend locked to the casing l I by the releasable brake means including therollers 38-39-48-41. Spring 45 urges the rollers 38-39 apart intowedging relation between the diverging planar cam profiles 58-59 and theportion of the cylindrical interior 22 of the casing engaging thediametrically opposite parts of these rollers engaged by said profiles.The rollers 49-4! react similarly between the cam profiles SIS-6| andthe opposed cylindrical part of the casing. As the parts are viewed inFig. 2 counter-clockwise rotation of the driven structure including thecam head 44 is prevented by complemental action of the rollers 38 and totending to become more tightly wedged between the profiles 58-65 and thepart of the cylindrical casing periphery engaging the diametric oppositesides of the rollers 38 and 4B. Clockwise rotation of the drivenstructure is prevented by the brake rollers 39-4! tending to become moretightly wedged between the profiles 59-5! and the opposed portions ofthe cylindrical interior of the casing. Springs i5 and 4t retain thebrake rollers in a firmly wedged condition at all times when the brakemeans of which they are constituents is in the unreleased conditionillustrated. Consequently the driven structure 22-46 is tightly held andprevented from minute movement in either rotative direction. Inasmuch asthe casing II is rigidly mounted in the bracket it, any adjustablemechanism such as the governor component of a constant speed throttlecontrol for an internal combustion engine can be maintained in a fixedpreselected setting. No drift from the setting because of vibration ofthe engine or parts including the bracket it connected therewith willdisturb the setting of the arm H in the position it is held by the brakerollers of the present device.

When it is desired to change the position of the arm H to change thesetting of any mechanism controlled thereby it is only necessary toimpart a rocking motion to the manually'operated control lever 35 ineither direction and a corresponding rocking motion will be imparted tothe arm H. Assuming that the control lever 35 is rocked in a directionto cause counter clockwise movement of the flange 2-5 and the brakereleasing means in the form or" the flanges 36-3? in Fig. 2, the seats55 and 5? will first react against the detent balls ll-48 to displacethem slightly toward one another incident to compressing the helicalexpansion spring 49. Pursuant to this initial counter-clockwise movementof the flanges 38-37 the flange end face 310 will be carried intoengagement with the brake roller 33 simultaneously with the flange endface 35a contacting the brake roller as. Pressure from the faces 3ta-3iaon the rollers 48-38 will unseat these rollers from their wedgedposition against the cam profiles. fit-58 and displace these rollersagainst the projections 63-62 so that continued counter-clockwisemovement of the driving structure 25 with the control handle 35 willimpart counter-clockwise rocking motion through the projections 32-53 tothe brake releasing flanges 36-31 until the rollers 38-4t regain theirwedged position whereupon force components applied by the detent balls47-48 upon the seats 55-5? complete the counter-clockwise restorativemotion of the flanges (it-31 to the position illustrated in Fig. 2. thenretain the driven structure locked in the new position.

When the control lever is rocked in the o' posite direction the flangefaces Stir-3??) will be forced against the rollers 39-41 to releasethese rollers and press them against the projections 62-63 so thatrocking motion is transmitted to the cam head 44 for rocking thedrivenstructure 42 and the arm H clockwise as the parts are viewed inFig. 2. During this clockwise rocking of the cam head 44 the camprofiles 53-53 are moved retractively with respect to the roll- Thewedged rollers 38-38-4t-4i ers 3840 so that these rollers do notinterfere with the rocking movement. When the desired adjustment is madeand manual force is withdrawnfrom the lever 35 the springs 45- 46 impartforce through the rollers 394| against the flange faces 3617-37?) forsupplementing the spring-pressed detentballs 41-48 rotating the flanges36- 31 counter-clockwise toward the position shown in Fig. 2 relativelyto the cam head. The final restorative counter-clockwise motion of the'flanges 3631 is caused by pressure ',of the detent balls upon the seats565'l for bringing these seats into'coaxial relation with the bore Againthe brake rollers will become effective.

as described above for. preventing rotation-of the driven structurerelatively to the casing I I so that the rigidly held arm H is effectivefor maintaining the adjusted position of any adjustable part connectedwith said arm.

An examination of the individual parts of this device will reveal thatthey are very sturdy and at the same time of a shape adapting them to beeconomically produced by mass production methods. The casing H forexample can be formed from a piece of bar stock by means of proper toolsoperated by an automatic screw machine. The driving structure can beturned on an automatic lathe from a piece of stock tubing after whichthe semi-circular flanges 31 can be formed from an initially continuousflange by a slotting machine which cuts away material for forming theend faces 36a35b31a--31b. The driven structure .4201. can also be formedfrom bar stock by an automatic lathe after which the flat cam profiles58-59-50-Bl can be formed by a broaching operation. The nut 11, brakerollers, detent balls, the helical springs, the O-rings and the snapring 3| are all massproduced standard parts.

Manual motions for assembling the parts are minimized because of thesmall number thereof. The driving and driven structures are assembledcoaxially together with the 0-rings 29 and 52 prior to insertiontogether with the brake rollers and the detent balls into thecylindrical chamber 2| after which the parts are held in assembly by thesingle operation of inserting the snap ring 3| into the groove 32. Sincethe left end of the casing H is integral with the cuplike casing noleakage of lubricating grease or oil can occur at this end of the deviceand the inexpensive O-rings 29 and 52 have proven to be admirablyeifective for preventing lubricant leakage along the surface of thecoaxially assembled parts through the open end of the chamber 2|.

In addition to the device employing a minimized number of partsconstituting a sealed permanently lubricated device, these parts areinherently sturdy to avoid deterioration though subjected to severevibration in some installations.

Having thus described a single preferred embodiment of the inventionwith the view of clearly and concisely illustrating the same, I claim:

1. In an adjustment motion transmitting and retaining device, a casinghaving a cylindrical chamber closed at one end and open at the otherend, a tubular driving structure rockable coaxially in said chamber,said structure having an inner end spaced axially from the closed end ofthe chamber, a driven structure rockable coaxially in the drivingstructure and having an inner end portion adjacently to the closed endof said chamber, releasable brake means dis- G posed in the spacebetween the inner endof the d'rivinggstructure and the closed end of thechamber and operable when unreleased to establish a braking connectionbetween the casing and the driven structure to prevent rocking of thelatter in either direction relatively to the casing, brake releasingmeans constrained for rocking with the driving structure and operableresponsively to rocking of such structure to release said brake meansand consequently the driven struc-" ture to facilitate rocking of thedriven structurein the direction the driving structure is rocked tocause such release, means for transmitting rocking motion from thedriving structure to the released. driven structure, said braking meansbeingadaptedto re-establish its braking con-'- nection between thecasing and the driven structure pursuant to termination of rocking'forceapplied-to the driving structure, said chamber being sufficientlycommodious to contain a lubricating substance in addition to saidstructures, sealing means between the driving structure and an innercircumferential peripheral portion of the chamber to preclude egress ofthe lubricant substance between the driving structure and suchperipheral portion of the chamber, and a second sealing means between aninner circumferential peripheral portion of the tubular structure andthe driven structure to preclude egress of the lubricant substance fromthe chamber between said structures.

2. In an adjustment motion transmitting and retaining device, a casinghaving a cylindrical inner periphery forming a chamber and an endopening coaxially with such periphery, a tubular driving structurehaving inner and outer ends and a circumferential groove in its exteriorperiphery between such ends, said tubular driving structure beinginserted endwise into the cylindrical periphery of the chamber iniournalled relation therewith to facilitate rocking of said structure inthe chamber, the inner end of the tubular structure being spaced fromthe inner end of the cylindrical periphery and the circumferentialgroove in the exterior periphery of said structure cooperating with thecasing to form a lubricant receiving space, an outer end portion of saidstructure projecting axially outwardly from the casing and facilitatingthe attachment thereto of a manual rocking lever, a driven structurejournalled in the tubular driving structure and having an inner endportion projecting in wardly of the casing beyond the inner end of thedriving structure and having an outer end portion projecting outwardlyof the casing beyond the outer end of the driving structure tofacilitate connection therewith of a part to be adjusted, releasablebrake means disposed in the cylindrical chamber between the inner endportion of the driven structure and the radially opposed cylindricalperiphery of such chamber and operable when unreleased to establish abraking connection between the casing and the driven structure toprevent rocking of the latter in either direction relatively to thecasing, brake releasing means constrained for rocking with the drivingstructure and operable responsively to rocking of such structure torelease said brake means and consequently the driven structure tofacilitate rocking of the driven structure in the direction the drivingstructure is rocked to cause such release, means for transmittingrocking motion from the driving structure to the released drivenstructure, said braking means being adapted to re-establish its brakingconnection portion of the outer periphery of the driving structure, asecond annular channel coaxial with and formed between the innerperiphery of the tubular driving structure and the outer periphery ofthe driven structure, and sealer O-rings respectively in said annularchannels to preclude 1,3 107 ingress of abrasive foreign particles intothe cas ing and to prevent egress of lubricant from said casing.

OSCAR H. BANKER.

References Cited in the 1116 of this patent UNITED STATES PATENTS-Number Number Name Date Warner Jan. 30, 1912 Nicholson Jan. 3, 1928Bethel Sept. 11, 1928 Delaval-Crow Oct. 1'7, 1933 Swartz Dec. 29, 1936Swartz' Aug. 29, 1939 Vickers Oct. 7, 1941 Nyborg June 23, 1942 FOREIGNPATENTS Country Date Great Britain July 19, 1917'

